Electric Vehicle Charging with Multi-Port Converter based Integration in DC Trolley-Bus Network

DC traction networks that supply power to trolley-buses, tramcars and trains can be simultaneously used to integrate fast-charging stations for Electric Vehicles (EVs). This strategy improves the traction grid utilization of urban transportation systems. In addition, it offers a potential solution to the increasing requirement of charging infrastructure due to proliferation of plug-in EVs and the associated impact on the existing distribution network. This paper suggests that the use of multi-port converter based integration of EV chargers with dc trolley-bus network can be a preferred solution in terms of defined efficiency boundary. A sensitivity analysis to charging power, substation distance and section length of overhead contact system is performed in comparison to the conventional two-port dc/dc converter based EV integration.